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NBR国产骨架油封TC42x55x60
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氟胶TC骨架油封42x55x58x60x62x65x68x70x72x75x7x8x10x12 耐高温
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水钻机水封密封圈 TC45X55X8 45x60x10 38x55x8 30x45x10 30x42x8